I wrote:
> After a bit more thought, HEAD+v14 is also my preference. I'm not
> eager to change this in stable branches, but it doesn't seem too
> late for v14.
Perusing the commit log, I realized that there's another reason why
v14 is a good cutoff: thread_test.c was in a different place with
an allegedly different raison d'etre before 8a2121185. So done
that way.
regards, tom lane